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Well here are some results for the Vargas Stage III upgrade that has caused the N54 forum section to basically be engaged in chaos for the past few months. From accusations of vaporware, to comparison to single turbo upgrades, to countless other arguments the day has come and the Stage III Vargas Turbo upgrade dyno'd on 91 octane with no meth 572 horsepower to the rear wheels. This is with a Cobb flash tuned by BimmerBoost vendor Pro-Tuning Freaks.

Impressive? Yep, sure is and this seems to also be a 91 octane pump gas only world record for the N54. Now keep in mind this is just the beginning. What will it do with meth? What will do on E85? What will it do with race gas and big boost? What about different turbos? Sky appears to be the limit but for now this kind of performance on pump gas sure is a big boost (hah, get it?) to the N54 scene.

Congratulations to all involved, Vargas Turbo Tech, Pro-Tuning Freaks, Cobb, and just the N54 community as well. The impossible just became possible. Pictures, video, and dynograph below.

It is hilarious how Tony is owning Shiv on the other forum... Tony did the right thing and brought us the most safe power than can be made on the lowest/most base octane available for this turbo setup. Shiv did all out glory runs on meth and is faulting Tony for provding that which everyone wanted to see. buauhaha

Yes, a dyno day shootoff is a must here...

Man am I ever glad they started with basic ACN91...no BS, no smoke 'n mirrors. Only gets better from here.

I'm not getting some of the fuel system comments. My understanding is that low pressure was solid, steady and rail pressure was short of target at X HP. Some thoughts:
1. With solid low pressure, HPFP is getting all the fuel it needs. Thus any changes to low pressure line/pressure won't have an effect on volume.
2. The HPFP is positive displacement. Fuel is being pushed into the pumping chamber based on pressure differential and since #1 we can't increase this volume.
3. This specific HPFP cannot support the needed volume at the requested pressure.
4. Lowing rail pressure should increase flow slightly, but you'd have to be careful with injector IDC.

Try a new pump for the short term. I'd like to see the fuel pressure logs.

Geez Shiv is in full whine mode trying to step on Vargas's results thread on the other site. He would have been better served just keeping is mouth shut. Really like the part about dumping the fuel tanks & verifying a 91 octane fill. Isn't there are story floating around about someone getting caught with a hidden fuel bladder?

Geez Shiv is in full whine mode trying to step on Vargas's results thread on the other site. He would have been better served just keeping is mouth shut. Really like the part about dumping the fuel tanks & verifying a 91 octane fill. Isn't there are story floating around about someone getting caught with a hidden fuel bladder?

Even 1 gallon of e85 makes a HUGE difference, especially on 91. FTW purple would be big whp by itself. If I was doing an octane-limited, public shoot out with my product on the line, I might do the same thing.

Even 1 gallon of e85 makes a HUGE difference, especially on 91. FTW purple would be big whp by itself. If I was doing an octane-limited, public shoot out with my product on the line, I might do the same thing.

In the end this will be super informative for us consumers!

Agree in certain cases it can be very important, you might want to do a search on the fuel bladder thing. Might even be something fuel bladders here.

(sorry for posting a copy-paste here ... I'm enjoying this forum as well and wanted to shame my thoughts here too).

Congrats to Vargas and Dzenno/PTF! Great results, looking forward to seeing how things progress.

I find it a little sad that for someone to do well, it automatically implied that someone else has to do poorly. When life or game_mechanics are built this way, there is no such thing as collaboration. There is only the "appearance" of it.

Regarding the attitudes towards single turbos or other modified turbos:Those who feel the need to defend - the cars are just as powerful as they were before this thread.Those who feel the need to attack - the cars are just as powerful as they were before this thread (get it?)

Of course then there will be those who will always go towards the "value" angle, which is completely subjective - with respect to how much does "fun" cost vs. "fun" enjoyed and then … You throw in "first mover" and "bleeding research" kicks. It's a ignorant way to view things, its end goal is selfish - making you feel better about yourself having "less" or "more" than others.

I firmly believe that most folks on the various forums are mildly modified and want to live vicariously through others and that's fine, but don't get in the way of those who are trying to go somewhere or do something.

I think that we forget that we are not the sum of our mods (tune, parts …), you are the result of the actions you take and the ones you choose not partake in. It is sad that someone's loyalty can be purchased for a $100, $300 or $1000+ part, I'd advise you not to fall pray to such a simpleton's way.

For those who really want to "support" progress -- buy a vendor's part/solution. Buy a bunch of things, try them out, swap/trade with friends and make it lucrative enough for the vendors to keep working on the platform you love.

I do remember not so long ago, there were no options with regards to aftermarket turbos. I think TDs were the first and then came ASR/RBs (no particular order), FFTEC/Vishnu Single Turbo, HPF single turbo, a bunch of other homemade single turbos and now Vargas.

How is this NOT good for the community?

What is good for the community is … support, whether financial or congratulatory. I hope we could all go that route or at least the majority of the contributors.

I'm not getting some of the fuel system comments. My understanding is that low pressure was solid, steady and rail pressure was short of target at X HP. Some thoughts:
1. With solid low pressure, HPFP is getting all the fuel it needs. Thus any changes to low pressure line/pressure won't have an effect on volume.
2. The HPFP is positive displacement. Fuel is being pushed into the pumping chamber based on pressure differential and since #1 we can't increase this volume.
3. This specific HPFP cannot support the needed volume at the requested pressure.
4. Lowing rail pressure should increase flow slightly, but you'd have to be careful with injector IDC.

Try a new pump for the short term. I'd like to see the fuel pressure logs.

With a higher low pressure more fuel is pushed faster in to the HPFP cavity, which has a relatively narrow opening compared to the fuel line feeding it, effectively augmenting its capacity.

PS. On the whole e90post bull$#@! fest. The twins are using vacuum based wastegates and thus the spool up is going to be in part a function of whatever was programmed by the tuner. With a JB4 ISO for example we'd hold the wastegates at 100% duty cycle by default during spool but that may or may not be how D has their flash programmed currently.